Fixed error in Mail-Backup-Cron-Task (created file /dev/nul - missing l)

Fix for mailrestore, to avoid confusion about web- and mail-backups with same ids

Falko Timme authored Jan 09, 2015 and Patrick Anders committed Jan 09, 2015

- Made sure SQL backups from servers that differ from the server where the website is on can be restored. A download of the backup is not possible in such a case, therefore I hide the "Download" button.

Conflicts:
	interface/lib/classes/plugin_backuplist.inc.php

- Responsive fixes

- Included new icons and buttons
- Layout scaling improved (up to 1260px width)

- Select2 combobox

- New dashboard layout

Removed possibility of reinstalling Instances

DMARC requieres SPF and DKIM (this breaks the current draft but DMARC is useless if you use spf OR dkim)

allow verification records for DMARC in a TXT-record (like example.com._report._dmarc.external.com. v=DMARC1;)